Lexus ES300 (2002 year). Manual — part 371
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DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
05-103
256
13
CHECK VACUUM HOSES (INTAKE MANIFOLD - VSV FOR
EVAP, VSV FOR EVAP -
CHARCOAL CANISTER)
(a)
Check that the vacuum hose is connected correctly.
(b)
Check the vacuum hose for looseness and disconnection.
(c)
Check the vacuum hose for cracks, hole, damage and blockage.
NG
REPAIR OR REPLACE
OK
14
CHECK OPERATION OF VSV(FOR EVAP) (See Step 1)
OK
Go to step 15
NG
CHECK VACUUM HOSES (8,9,10 AND 11 IN CIRCUIT DESCRIPTION)
15
CHECK HARNESS AND CONNECTOR (E.F.I. ECU RELAY - VSV FOR EVAP, VSV
FOR EVPA - ECM)
NG
REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
16
CHECK VACUUM HOSES(VSV FOR CCV - CHARCOAL CANISTER)
(a)
Check that the vacuum hose is connected correctly.
(b)
Check the vacuum hose for looseness and disconnection.
(c)
Check the vacuum hose for cracks, hole damage, and blockage.
NG
CORRECTLY INSTALL FUEL TANK CAP
OK
17
CHECK OPERATION OF VSV(FOR CCV) (See Step 1)
OK
NG
REPLACE VSV AND CHARCOAL CANISTER, AND THEN CLEAN VACUUM HOSE
ON
VSV for pressure
Switching Valve
OFF
VSV for EVAP
30 sec.
ON
OFF
ON
OFF
VSV for CCV
Measure
Voltage
A52981
A53769
E2
PTNK
05-104
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DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
257
18
CHECK HARNESS AND CONNECTOR(E.F.I. ECU RELAY - VSV FOR OCV, VSV
FOR CCV - ECM)
NG
REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
19
CHECK OPERATION OF VSV(FOR PRESSURE SWITCHING VALVE)
(See Step 1)
OK
Go to step 20
NG
REPLACE VSV AND CHARCOAL CANISTER, AND THEN CLEAN VACUUM HOSE
20
CHECK HARNESS AND CONNECTOR(E.F.I. ECU RELAY - VSV FOR PRESSURE
SWITCHING VALVE,VSV FOR PRESSURE SWITCHING VALVE - ECM)
NG
REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
21
PERFORM ACTIVE TEST BY OBD II SCAN TOOL OR HAND-HELD TESTER(FUEL
TANK ASSY)
(a)
Connect the hand-held tester to the DLC3.
(b)
Select the ACTIVE TEST mode on the hand-held tester.
(c)
Start the engine.
(d)
The VSV for the CCV is ON by the hand-held tester.
(e)
The VSV for the EVAP and the VSV for the pressure
switching valve are ON by the hand-held tester and hold
the VSV for the EVAP until voltage between terminals
PTNK and E2 becomes 1.2 V.
(f)
Measure the voltage between terminals PTNK and E2 of
the ECM connectors 30 sec. after switching the VSV for
the EVAP and the VSV for the pressure switching valve
from ON to OFF.
Voltage:
When there is no sharp change of the voltage with the
voltage of more or less 1.2 V
NG
REPLACE FUEL TANK ASSY
OK
ON
OFF
ON
OFF
ON
OFF
VSV for pressure
Switching Valve
VSV for EVAP
VSV for CCV
30 sec.
Measure
Voltage
A52982
A53769
E2
PTNK
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
05-105
258
22
PERFORM ACTIVE TEST BY OBD II SCAN TOOL OR HAND-HELD
TESTER(CHARCOAL CANISTER ASSY)
(a)
Connect the hand-held tester to the DLC3.
(b)
Select the ACTIVE TEST mode on the hand-held tester.
(c)
Start the engine.
(d)
The VSV for the CCV and the VSV for the pressure
switching valve are ON by the hand-held tester.
(e)
The VSV for the EVAP is ON by the hand-held tester and
hold the VSV for the EVAP until voltage between termi-
nals PTNK and E2 becomes 1.2 V.
(f)
Measure the voltage between terminals PTNK and E2 of
the ECM connectors 30 sec. after switching the VSV for
the EVAP from ON to OFF.
Voltage:
When there is no sharp change of the voltage with the
voltage of more or less 1.2 V
NG
REPLACE CHARCOAL CANISTER ASSY
OK
23
CHECK CHARCOAL CANISTER ASSY (See page
)
NG
REPLACE CHARCOAL CANISTER ASSY
OK
24
CHECK FUEL TANK OVER FILL CHECK VALVE
NG
REPLACE VSV AND CHARCOAL CANISTER,
AND THEN CLEAN VACUUM HOSE
OK
REPLACE CHARCOAL CANISTER ASSY
OBDII scan tool (excluding Hand-held Tester):
1
CHECK FOR EVAPORATIVE EMISSIONS LEAK
NG
REPAIR OR REPLACE
OK
05-106
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
259
2
INSPECT FUEL TANK CAP ASSY(TOYOTA GENUINE PARTS)
NG
REPLACE TO TOYOTA GENUINE PARTS
OK
3
CHECK THAT FUEL TANK CAP IS CORRECTLY INSTALLED
NG
CORRECTLY INSTALL FUEL TANK CAP
OK
4
INSPECT FUEL TANK CAP ASSY (See page
)
NG
REPLACE FUEL TANK CAP ASSY
OK
5
INSPECT FUEL TANK INLET PIPE SUB-ASSY(FOR DAMAGE)
(a)
Remove the fuel tank cap.
(b)
Visually inspect the fuel inlet pipe for damage.
NG
REPLACE FUEL TANK INLET PIPE SUB-ASSY
OK
6
CHECK VACUUM HOSES(VAPAOR PRESSURE SENSOR - FUEL
TANK,CHARCOAL CANISTER - VSV FOR PRESSURE SWITCHING VALVE)
NG
REPAIR OR CONNECT VSV AND SENSOR
CONNECTOR
OK
7
CHECK FUEL HOSE(FUEL TANK - CHARCOAL CANISTER)
NG
REPAIR OR REPLACE
OK
8
CHECK EACH VSV CONNECTOR FOR LOOSENESS AND DISCONNECTION
NG
REPAIR OR CONNECT VSV AND SENSOR
CONNECTOR
OK
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